1998 Grand Prix Windshield wiper problem passenger side wiper acts erractically

Question edited for clarity 'year MAKE model'.

I see Larry has answered, but here are the full diagrams.

Fuse Box Diagram Pontiac Grand Prix (1997-2003)

https://fuse-box.info > pontiac > pontiac-grand-prix-19...
Fuse box location ... It is located in the glovebox, behind the cover on the right. The location of the fuses in the passenger compartment: Pontiac Grand Prix ...

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  Fuse Box Diagram Pontiac

  https://fuse-box.info > Home > Pontiac
  Fuse box diagrams (location and assignment of the electrical fuses and relays) ... fuses and relays) for Pontiac Grand Prix (1997, 1998, 1999, 2000, 2001, ...

Pontiac Grand Prix mk6 (Sixth Generation; 1998) - fuse ...

https://www.autogenius.info > pontiac-grand-prix-mk6-...
Feb 26, 2017 - The underhood fuse block is located on the passenger's side of the vehicle in the engine compartment. Pontiac Grand Prix - fuse box - engine ...

Pontiac Grand Prix 1998 Fuse Box/Block Circuit Breaker ...

https://www.carfusebox.com > pontiac-grand-prix-1998...
Jan 3, 2021 - Pontiac Grand Prix 1998 Fuse Box/Block Circuit Breaker Diagram ; Circuit Breaker ; HEADLMP, Headlamps ; PWR SEAT, Power seat, Power lumbar ; PWR WDO ...

everything will cross over but the engine and transmission in the gtp are suppose be heavier duty built

Check the fuses and relay. It could be the wiper motor going out as well

The intermittent function for the wipers has a variable resistor that controls the timing of the wipers in this mode. Replacement of the wiper switch will resolve this issue. Over time they do become worn, and do not make contact during the entire wiper cycle.

The wiper arms are mounted to "splined" shafts. Either the arm or shaft may be stripped. You need to remove the arm and inspect them.

The arm is stripped onto the stud its pressed into which is call a wiper transmission. That part mounts to eack ww blade then to the wiper motor. You need a new transmission and maybe a new wiper are as well

Loosen the nut on top then realign them then tighten the nut. I have to do mine every time they get frozen.

try your local auto wreckers you cant miss!

could be that when it rains or is wet out that water is leaking into your car under the hood under the vent by the windshield wipers on the passenger side and instead of being filtered out its going into the car on the passenger side floor. (check to see if this is wet after a heavy rainfall) and causing a short and rusting it out. this happened with my 2002 grand prix just this year. I got a water resistor for like $3.50 from a local pontiac dealership/parts store and put it in. Its easy to install and it poured out today and my car didnt leak at all.

yea on bottom rt of ur windshield is what is called the cowl black plastic piece arond the bottom of ur windshield underthat should be weather stripping that may have come off